gpio: Convert to devm_ioremap_resource()

Convert all uses of devm_request_and_ioremap() to the newly introduced
devm_ioremap_resource() which provides more consistent error handling.

devm_ioremap_resource() provides its own error messages so all explicit
error messages can be removed from the failure code paths.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Acked-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

5 files changed, 25 insertions, 26 deletions

diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c
index 7d9bd94be8d2..bf6c7c989aee 100644
--- a/drivers/gpio/gpio-mvebu.c
+++ b/drivers/gpio/gpio-mvebu.c
@@ -33,6 +33,7 @@
  *   interrupts.
  */
 
+#include <linux/err.h>
 #include <linux/module.h>
 #include <linux/gpio.h>
 #include <linux/irq.h>
@@ -544,11 +545,10 @@ static int mvebu_gpio_probe(struct platform_device *pdev)
         mvchip->chip.of_node = np;
 
         spin_lock_init(&mvchip->lock);
-        mvchip->membase = devm_request_and_ioremap(&pdev->dev, res);
-        if (! mvchip->membase) {
-                dev_err(&pdev->dev, "Cannot ioremap\n");
+        mvchip->membase = devm_ioremap_resource(&pdev->dev, res);
+        if (IS_ERR(mvchip->membase)) {
                 kfree(mvchip->chip.label);
-                return -ENOMEM;
+                return PTR_ERR(mvchip->membase);
         }
 
         /* The Armada XP has a second range of registers for the
@@ -561,11 +561,11 @@ static int mvebu_gpio_probe(struct platform_device *pdev)
                         return -ENODEV;
                 }
 
-                mvchip->percpu_membase = devm_request_and_ioremap(&pdev->dev, res);
-                if (! mvchip->percpu_membase) {
-                        dev_err(&pdev->dev, "Cannot ioremap\n");
+                mvchip->percpu_membase = devm_ioremap_resource(&pdev->dev,
+                                                               res);
+                if (IS_ERR(mvchip->percpu_membase)) {
                         kfree(mvchip->chip.label);
-                        return -ENOMEM;
+                        return PTR_ERR(mvchip->percpu_membase);
                 }
         }
 
diff --git a/drivers/gpio/gpio-mxs.c b/drivers/gpio/gpio-mxs.c
index fa2a63cad32e..45d97c46831a 100644
--- a/drivers/gpio/gpio-mxs.c
+++ b/drivers/gpio/gpio-mxs.c
@@ -20,6 +20,7 @@
  * MA  02110-1301, USA.
  */
 
+#include <linux/err.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
@@ -253,12 +254,14 @@ static int mxs_gpio_probe(struct platform_device *pdev)
                         parent = of_get_parent(np);
                         base = of_iomap(parent, 0);
                         of_node_put(parent);
+                        if (!base)
+                                return -EADDRNOTAVAIL;
                 } else {
                         iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-                        base = devm_request_and_ioremap(&pdev->dev, iores);
+                        base = devm_ioremap_resource(&pdev->dev, iores);
+                        if (IS_ERR(base))
+                                return PTR_ERR(base);
                 }
-                if (!base)
-                        return -EADDRNOTAVAIL;
         }
         port->base = base;
 
diff --git a/drivers/gpio/gpio-spear-spics.c b/drivers/gpio/gpio-spear-spics.c
index 5f45fc4ed5d1..7a4bf7c0d98f 100644
--- a/drivers/gpio/gpio-spear-spics.c
+++ b/drivers/gpio/gpio-spear-spics.c
@@ -140,11 +140,9 @@ static int spics_gpio_probe(struct platform_device *pdev)
                 return -ENOMEM;
         }
 
-        spics->base = devm_request_and_ioremap(&pdev->dev, res);
-        if (!spics->base) {
-                dev_err(&pdev->dev, "request and ioremap fail\n");
-                return -ENOMEM;
-        }
+        spics->base = devm_ioremap_resource(&pdev->dev, res);
+        if (IS_ERR(spics->base))
+                return PTR_ERR(spics->base);
 
         if (of_property_read_u32(np, "st-spics,peripcfg-reg",
                                 &spics->perip_cfg))
diff --git a/drivers/gpio/gpio-stp-xway.c b/drivers/gpio/gpio-stp-xway.c
index 85841ee70b17..c20e05151212 100644
--- a/drivers/gpio/gpio-stp-xway.c
+++ b/drivers/gpio/gpio-stp-xway.c
@@ -214,11 +214,10 @@ static int xway_stp_probe(struct platform_device *pdev)
         if (!chip)
                 return -ENOMEM;
 
-        chip->virt = devm_request_and_ioremap(&pdev->dev, res);
-        if (!chip->virt) {
-                dev_err(&pdev->dev, "failed to remap STP memory\n");
-                return -ENOMEM;
-        }
+        chip->virt = devm_ioremap_resource(&pdev->dev, res);
+        if (IS_ERR(chip->virt))
+                return PTR_ERR(chip->virt);
+        
         chip->gc.dev = &pdev->dev;
         chip->gc.label = "stp-xway";
         chip->gc.direction_output = xway_stp_dir_out;
diff --git a/drivers/gpio/gpio-tegra.c b/drivers/gpio/gpio-tegra.c
index 63cb643d4b5a..414ad912232f 100644
--- a/drivers/gpio/gpio-tegra.c
+++ b/drivers/gpio/gpio-tegra.c
@@ -17,6 +17,7 @@
  *
  */
 
+#include <linux/err.h>
 #include <linux/init.h>
 #include <linux/irq.h>
 #include <linux/interrupt.h>
@@ -450,11 +451,9 @@ static int tegra_gpio_probe(struct platform_device *pdev)
                 return -ENODEV;
         }
 
-        regs = devm_request_and_ioremap(&pdev->dev, res);
-        if (!regs) {
-                dev_err(&pdev->dev, "Couldn't ioremap regs\n");
-                return -ENODEV;
-        }
+        regs = devm_ioremap_resource(&pdev->dev, res);
+        if (IS_ERR(regs))
+                return PTR_ERR(regs);
 
         for (i = 0; i < tegra_gpio_bank_count; i++) {
                 for (j = 0; j < 4; j++) {